Illumination system for a micro display
First Claim
Patent Images
1. An apparatus comprising:
- a light source;
a package for the light source having a reflective surface on at least one side of the light source;
a diffuser opposite the reflective surface in direct view of the light source;
a film stack to receive light through the diffuser, the film stack transmitting light within a maximum exit angle and reflecting substantially all other light to the diffuser.
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Abstract
A compact and efficient illumination system is provided that is particularly suitable for illuminating a micro display and places the light source within the view of the display. In one embodiment, the illumination system comprises a light source, a package for the light source having a reflective surface on at least one side of the light source, and a diffuser opposite the reflective surface in direct view of the light source. The invention further comprises a film stack to receive light through the diffuser, the film stack transmitting light within a maximum exit angle and reflecting substantially all other light to the diffuser.
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Citations
23 Claims
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1. An apparatus comprising:
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a light source;
a package for the light source having a reflective surface on at least one side of the light source;
a diffuser opposite the reflective surface in direct view of the light source;
a film stack to receive light through the diffuser, the film stack transmitting light within a maximum exit angle and reflecting substantially all other light to the diffuser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a display;
an imaging lens to magnify and image the display;
a light source to illuminate the display;
a package for the light source having a reflective surface on at least one side of the light source;
a diffuser opposite the reflective surface;
a film stack to receive light through the diffuser, the film stack transmitting light from the diffuser within a maximum exit angle and reflecting substantially all other light to the diffuser. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus comprising:
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means for generating light;
means for reflecting light from the light source though an aperture, the aperture being within view of the light source;
means adjacent the aperture for diffusing the light reflected through the aperture;
means for enhancing the brightness of the diffused light within a maximum exit angle. - View Dependent Claims (21, 22, 23)
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Specification